Since I'm her father, the former is probably more likely.
I'm an uncle to many, MANY nieces and nephews. I've been one since I was 6 years old. Every time one of them has started to learn words, one of them has always been "up." That's the word that gets them into the comfort and safety of their parents' arms.
What has our daughter learned? Aside from "no" and "don't," she has also learned "down."
She uses "down" interchangeably for asking to get down and asking to get up.
I'm starting to wonder what she has planned for the teenage years.